Rate increase is a good thing

I went to book my flight on Air Tran and found the cost went from $144 to $415 for the flight from Baltimore. I called and they said all the discount seats for that day (2-2-11) were sold out.
Being cheap I check for 2-1-11 and found the $144 seats still avaliable. Book for 2-1 added a day at CSS and saved money! That is a good day!